OCZ ram and a P55A-UD3 motherboard only see's 4gb not 8gb

[scoutermike]

Hi, I have this board with a i7 870 and it has ocz pc312800 9-9-9-24 @1.65v 2gb sticks, 4 in total. It only shows in the bios 4gb enabled. It shows all the memory slots with 2gb in them but only the first two are enabled. I have updated the bios, I have moved the memory sticks around, I have memtested the ram one stick at a time with 10 passes. This is a new computer I havn't even put windows on it, I am just trying to get the memory problem fixed first. I have read about disabling the xmp profile but I don't see that option under mit. My ram is ocz3ob1600lv4gk 1600. Any idea's? thanks

[Dark Mantis]

Hi and welcome to the Gigabyte Forum.

You won't find an XMP profile as there isn't one attached to your memory as far as I know. So it is not something that you can disable.
The OCZ memory might not be compatible with this motherboard or it is possible that there are some bent pins in the CPU socket.
Have you checked on the QVLs of both Gigabyte and OCZ to see if they are compatible?

[scoutermike]

At ocz it says Qualifed on Intel P55 Chipsets and Core i3, i5, i7 CPUs and on gigabyte it says Memory modules listed below are for reference only. Due to massive memory models on the market, we can only verify some of them. So I don't know what to do with it.

[Dark Mantis]

OK. This is one reason I don't like OCZ. They don't like commiting themselves to anything precise. Just because it is compatible with P55 chipsets doesn't really mean a lot. Did you not check before you purchased it?
Anyway for now let's assume it is ok. Have you entered the settting manually into the BIOS  or are you relying on the "Auto" settings?

[scoutermike]

Setting are set at 9-9-9-24 (CAS-TRCD-TRP-TRAS), tRFC - 88, Command Rate - 2N and memory voltage to 1.65V.

[Dark Mantis]

Right as you are using all the slots you might need to increase your memory voltage a little to compensate so try putting it up to 1.66V which will probably help or even as far as 1.68Vif necessary but don't forget to make sure that the QPI/Vtt is kept to within 0.5V of that setting. It can be closer but no further away.

[scoutermike]

I put the memory volts to 1.68 and QPI  to 1.19 and there was no difference.

[Dark Mantis]

Try 1.3V for the QPI/Vtt and 1.70V for the memory.
If it still isn't working return the settings to their original values.

[scoutermike]

Those setting didn't work.

[Dark Mantis]

OK what is your uncore settings and memory multiplier?

[scoutermike]

uncore is 2398.84 at 18x
memory is 1332.73 at 10x is that the settings you are asking about?

[Dark Mantis]

Yes. The uncore is too low , should be 2x multiplier +1or2 ( ie 20-22)

[scoutermike]

How do I change that I don't see a place to set the value?

[Dark Mantis]

MIT/uncore clock ratio/change from auto to desired number

[scoutermike]

I have under QPI ratio x32 under that the uncore ratio is locked out. I can't change it from 18x 1800mhz